Stepping off the set of her exciting new series “Chicago PD,” Sophia Bush scored the cover of Maxim magazine’s April 2014 issue

While rocking a few poses in sexy lingerie for the sultry Macelo Krasilcic-shot spread, the former “One Tree Hill” leading lady chatted about her very successful career and shared a few details about her action-packed show.

It's hard to believe that it's been twelve years since tragedy struck New York City, Washington DC and Shanksville, Pennsylvania over the course of mere hours, and while so much has changed since September 11th, 2001, America still mourns the massive losses suffered by so many folks.

On this day of remembrance, some of our favorite celebrities are taking to Twitter to share some love. See what they had to say below.